/* layout */
div#app {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 1080px;
    margin: 0 auto;
}

@media screen and (max-width: 1024px) {
    div#app {
        width: 100vw;
    }
}

header {
    flex: auto;
    min-width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100px;
}

nav {
    flex: auto;
    min-width: 100%;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    height: 40px;
    background-color: #003388;
}

main {
    flex: auto;
    min-width: 100%;
    min-height: calc(100vh - 140px);
}

footer {
    flex: auto;
    min-width: 100%;
    height: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #e3e3e3;
}

a {
    text-decoration: none;
}

img {
    width: 100%;
}